CN114012861B - Preparation process of flame-retardant bamboo board - Google Patents
Preparation process of flame-retardant bamboo board Download PDFInfo
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- CN114012861B CN114012861B CN202111435172.8A CN202111435172A CN114012861B CN 114012861 B CN114012861 B CN 114012861B CN 202111435172 A CN202111435172 A CN 202111435172A CN 114012861 B CN114012861 B CN 114012861B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/20—Moulding or pressing characterised by using platen-presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27J—MECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
- B27J1/00—Mechanical working of cane or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/0207—Pretreatment of wood before impregnation
- B27K3/0214—Drying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K9/00—Chemical or physical treatment of reed, straw, or similar material
- B27K9/002—Cane, bamboo
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Forests & Forestry (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention relates to the technical field of bamboo and wood processing, in particular to a preparation process of a flame-retardant bamboo board, which comprises the steps of firstly carrying out primary drying, then carrying out carbonization treatment under specific conditions, enabling glue to completely and uniformly permeate into inner pores of bamboo strips during primary gum dipping, wrapping a layer of glue on the surfaces of the bamboo strips after secondary drying and secondary gum dipping, then carrying out tertiary drying, and pressing the bamboo boards through high pressure of 20-28MPa to obtain the bamboo boards with the density of 1.25g/cm 3 As described above. Compared with the prior art, the bamboo board prepared by the preparation process does not need to add any flame retardant, so that the flame retardant is not lost due to rain wash, excellent flame retardant performance can be still ensured after long-time rain wash outdoors, and environmental pollution caused by flame retardant loss is avoided.
Description
Technical Field
The invention relates to the technical field of bamboo and wood processing, in particular to a preparation process of a flame-retardant bamboo board.
Background
The bamboo board has excellent physical performance, small water absorption expansion coefficient, no crack and no deformation.
Because the bamboo product has the characteristic of inflammability, in order to enable the bamboo board to reach the flame retardant grade, a flame retardant is usually required to be added into the bamboo board, for example, chinese patent with application publication No. CN10814815A discloses a method for preparing a waste-utilizing type flame retardant bamboo board, the steps are that after bamboo sections are cut into bamboo pieces, the bamboo pieces are immersed into the flame retardant, the bamboo pieces are immersed for 5-8h in the environment of 40-90 ℃, then the bamboo pieces are crushed, then the coal ash, the adhesive, the flame retardant, the lubricant and the brightening agent are mixed into the bamboo powder, and the bamboo board is molded through heating, so that the flame retardant purpose of the bamboo board is achieved.
However, if the bamboo board is used as an outdoor bamboo board, if a fire retardant is added, the fire retardant such as fire-proof salt is easy to lose through rain wash, so that the fire resistance is reduced, and the environmental pollution is caused by the loss of the fire retardant.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a preparation process of the bamboo board which is suitable for outdoor and resists rain wash and is durable in flame retardance.
In order to solve the technical problems, the invention adopts the technical scheme that:
the preparation process of the flame-retardant bamboo board comprises the following steps:
drying the bamboo chips for the first time;
carbonizing the bamboo chips after primary drying in an environment of 180-220 ℃, and uniformly spraying water to the bamboo chips during carbonization so as to keep the surface temperature of the bamboo chips at 140-160 ℃;
cooling the carbonized bamboo chips, and performing first impregnation to enable glue to penetrate into the bamboo filaments;
drying the bamboo chips subjected to the first gum dipping for the second time;
performing secondary impregnation on the bamboo chips dried for the second time to enable the glue to wrap the surfaces of the bamboo chips;
drying the bamboo chips subjected to the second gum dipping for the third time;
pressing the dried bamboo chips for the third time at 20-28MPa to obtain the bamboo boards.
Further, in the preparation process of the flame-retardant bamboo board, the temperature for the first drying is 50-60 ℃ and the time is 5-7h.
Further, in the preparation process of the flame-retardant bamboo board, the temperature for the second drying is 50-60 ℃ and the time is 1-1.5 hours, and the temperature for the third drying is 50-60 ℃ and the time is 1-1.5 hours.
Further, in the preparation process of the flame-retardant bamboo board, the first impregnation time is 20-40min.
Further, in the preparation process of the flame-retardant bamboo board, the time of the second impregnation is 20-40min.
Further, in the preparation process of the flame-retardant bamboo board, the first impregnation time is 20min.
Further, in the preparation process of the flame-retardant bamboo board, the time of the second gum dipping is 20min.
Further, in the preparation process of the flame-retardant bamboo board, in the step, the bamboo chips after primary drying are carbonized in an environment of 200 ℃, and water is uniformly sprayed to the bamboo chips in the carbonization process, so that the surface temperature of the bamboo chips is kept at 150 ℃.
Further, in the preparation process of the flame-retardant bamboo board, the density of the bamboo board is 1.25g/cm 3 As described above.
The invention has the beneficial effects that: the preparation process of the flame-retardant bamboo board comprises the steps of firstly, primarily drying, then, carbonizing under specific conditions, enabling glue to completely and uniformly penetrate into inner pores of bamboo battens during first impregnation, enabling the surfaces of the bamboo battens to be coated with a layer of glue after second drying and second impregnation, then, drying for the third time, pressing into the bamboo board through high pressure of 20-28MPa, and enabling the density of the bamboo board obtained through pressing to reach 1.25g/cm 3 As described above. Compared with the prior art, the bamboo board prepared by the preparation process does not need to add any flame retardant, so that the flame retardant is not lost due to rain wash, excellent flame retardant performance can be still ensured after long-time rain wash outdoors, and environmental pollution caused by flame retardant loss is avoided.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description will be given with reference to the embodiments.
The invention relates to a preparation process of a flame-retardant bamboo board, which comprises the following steps:
drying the bamboo chips for the first time;
carbonizing the bamboo chips dried for the first time in an environment of 180-220 ℃, and uniformly spraying water to the bamboo chips during carbonization so as to keep the surface temperature of the bamboo chips at 140-160 ℃;
cooling the carbonized bamboo chips, and performing first impregnation to enable glue to penetrate into the bamboo filaments;
drying the bamboo chips subjected to the first gum dipping for the second time;
performing secondary impregnation on the bamboo chips dried for the second time to enable the glue to wrap the surfaces of the bamboo chips;
drying the bamboo chips subjected to the second gum dipping for the third time;
pressing the dried bamboo chips for the third time at 20-28MPa to obtain the bamboo boards.
In the process, after primary drying, carbonization treatment under specific conditions is carried out, so that glue can completely and uniformly permeate into inner pores of the bamboo strips during first impregnation, a layer of glue is wrapped on the surfaces of the bamboo strips after second drying and second impregnation, and then the bamboo strips are dried for the third time and pressed into the bamboo board through high pressure of 20-28MPa, so that the density of the bamboo board obtained through pressing reaches 1.25g/cm 3 The above.
Further, in the preparation process of the flame-retardant bamboo board, the temperature for the first drying is 50-60 ℃ and the time is 5-7h.
Further, in the preparation process of the flame-retardant bamboo board, the temperature for the second drying is 50-60 ℃ and the time is 1-1.5 hours, and the temperature for the third drying is 50-60 ℃ and the time is 1-1.5 hours.
Further, in the preparation process of the flame-retardant bamboo board, the first gum dipping time is 20-40min.
Further, in the preparation process of the flame-retardant bamboo board, the time of the second gum dipping is 20-40min.
Further, in the preparation process of the flame-retardant bamboo board, the first impregnation time is 20min.
Further, in the preparation process of the flame-retardant bamboo board, the time of the second impregnation is 20min.
Further, in the preparation process of the flame-retardant bamboo board, in the step, the bamboo chips after primary drying are carbonized in an environment of 200 ℃, and water is uniformly sprayed to the bamboo chips in the carbonization process, so that the surface temperature of the bamboo chips is kept at 150 ℃.
Further, in the preparation process of the flame-retardant bamboo board, the density of the bamboo board is 1.25g/cm 3 The above.
Example 1
A preparation process of a flame-retardant bamboo board comprises the following steps:
drying the bamboo chips for the first time, wherein the temperature for drying for the first time is 55 ℃, and the time is 6 hours;
carbonizing the bamboo chips after primary drying in an environment of 200 ℃, and uniformly spraying water to the bamboo chips during carbonization so as to keep the surface temperature of the bamboo chips at 150 ℃;
cooling the carbonized bamboo chips, and performing first impregnation to enable glue to permeate into the bamboo filaments, wherein the first impregnation time is 30min;
drying the bamboo chips subjected to the first gum dipping for the second time, wherein the temperature of the second drying is 55 ℃, and the time is 1.2h;
performing second impregnation on the bamboo chips subjected to the second drying, so that the glue wraps the surfaces of the bamboo chips, wherein the second impregnation time is 30min;
drying the bamboo chips subjected to the second gum dipping for the third time at 55 ℃ for 1.2h;
pressing the bamboo chips dried for the third time at 24MPa to form a bamboo board, wherein the density of the bamboo board is 1.27g/cm 3 。
Example 2
A preparation process of a flame-retardant bamboo board comprises the following steps:
drying the bamboo chips for the first time, wherein the temperature for drying for the first time is 50 ℃, and the time is 5 hours;
carbonizing the bamboo chips after primary drying in an environment of 180 ℃, and uniformly spraying water to the bamboo chips during carbonization so as to keep the surface temperature of the bamboo chips at 140 ℃;
cooling the carbonized bamboo chips, and performing first impregnation to enable glue to permeate into the bamboo filaments, wherein the first impregnation time is 20min;
drying the bamboo chips subjected to the first gum dipping for the second time, wherein the temperature of the second drying is 50 ℃, and the time is 1h;
performing secondary impregnation on the bamboo chips dried for the second time, so that the glue wraps the surfaces of the bamboo chips, wherein the secondary impregnation time is 20min;
drying the bamboo chips subjected to the second gum dipping for the third time, wherein the temperature of the drying for the third time is 50 ℃, and the time is 1h;
pressing the bamboo chips dried for the third time at 20MPa to form the bamboo boards.
Example 3
A preparation process of a flame-retardant bamboo board comprises the following steps:
drying the bamboo chips for the first time, wherein the temperature for drying for the first time is 60 ℃, and the time is 7 hours;
carbonizing the bamboo chips dried for the first time in an environment of 220 ℃, and uniformly spraying water to the bamboo chips during carbonization so as to keep the surface temperature of the bamboo chips at 160 ℃;
cooling the carbonized bamboo chips, and performing first impregnation to enable glue to permeate into the bamboo filaments, wherein the first impregnation time is 40min;
drying the bamboo chips subjected to the first gum dipping for the second time, wherein the temperature of the second drying is 60 ℃, and the time is 1.5h;
performing second impregnation on the bamboo chips subjected to the second drying, so that the glue wraps the surfaces of the bamboo chips, wherein the second impregnation time is 40min;
drying the bamboo chips subjected to the second gum dipping for the third time at the temperature of 60 ℃ for 1.5h;
pressing the bamboo chips dried for the third time at 28MPa to form the bamboo board.
Comparative example 1
Based on the embodiment 1, the second gumming and third drying steps are omitted.
Comparative example 2
In addition to example 1, the carbonization step of the bamboo chips was omitted.
Comparative example 3
A preparation process of a flame-retardant bamboo board comprises the following steps:
soaking bamboo chips in a flame retardant for 5-8h at 60 ℃, then drying, crushing, heating 900 parts of bamboo powder, 60 parts of fly ash, 25 parts of adhesive, 2 parts of flame retardant, 2 parts of lubricant and 2 parts of brightener according to mass powder at 75 ℃ for 45min, and then extruding into bamboo boards under the pressure of 1.8-2.0 MPa.
The flame-retardant bamboo board prepared in the example 1 is entrusted to the national building engineering material quality supervision and inspection center for flame retardant property detection, the entrusted number is FH22-210455, the judgment basis is GB 8624-2012, the inspection report number is FH226-21-457, and the inspection conclusion shows that the combustion property of the flame-retardant bamboo board conforms to B specified in GB 8624-2012 1 And (B-s 1) grade paving material requirements.
The test items include critical thermal radiant flux (CHF, kW/m) 3 ) Wherein the standard value is more than or equal to 8.0, the detection result is more than or equal to 11, and the detection method refers to GB/T11785-2005.
Also included are combustibility: the ignition time is 15s, the flame tip height (mm) in 20s, wherein the standard value is less than or equal to 150, the detection result is less than 150, and the detection method refers to GB/T8626-2007.
The method also comprises the smoke yield of the paving material, (% × min), wherein the standard value is not more than 750, the detection result is 50, and the detection method refers to GB/T11785-2005.
SGS quality detection is carried out on the flame-retardant bamboo board prepared in the example 1, and the report number of a detection report is AJFS1707004982FF _ CN, and the reference number of SGS is SHIN170702105CCM.
The detection result is that the fire-protection grade is B f1 -s1。
The flame-retardant bamboo board prepared in the embodiment 1 is entrusted to the national artificial board and the forestry product quality supervision and inspection center for quality detection, and the detection report is numbered as follows: (2018) GJLRE-023, and the detection results are as follows:
the density was 1.27g/cm 3 The water content is 7.0 percent, the 24-hour water absorption thickness expansion rate is 0.5 percent, the static bending strength is 105.7MPa, the elastic modulus is 14460MPa, and the formaldehyde emission is 0.4mg/L.
Comparative experiment:
the bamboo boards prepared in the examples 1 to 3 and the comparative examples 1 to 3 are divided into two parts, one part is subjected to flame retardant test comparison, and the results refer to GB 8624-2012, and show that the bamboo boards prepared in the examples 1 to 3 and the comparative example 3 conform to the B regulation of GB 8624-2012 1 The requirements of the grade flooring material are met, while the bamboo boards prepared in comparative examples 1-2 only meet B 2 The requirements of the graded paving materials; the other part is subjected to simulated rain treatment under the same condition, namely water is sprayed to the board for 2 hours every day, after two months, the bamboo board is dried, and the bamboo board is subjected to flame retardant test comparison, referring to GB 8624-2012, the flame retardant bamboo board prepared in the embodiments 1-3 still meets the B regulation of GB 8624-2012 1 The requirements of grade flooring materials are met, while the bamboo boards prepared in comparative examples 1-2 can not reach B 2 The requirements of grade flooring materials are met, while the bamboo board prepared in the comparative example 3 can only reach B 2 And (5) grading floor paving material requirements.
The experiment proves that compared with the prior art, the bamboo board prepared by the preparation process of the flame-retardant bamboo board does not need to add any flame retardant, so that the flame retardant is not lost due to rain wash, excellent flame retardant performance can be still ensured after long-time rain wash outdoors, and environmental pollution caused by flame retardant loss is avoided.
The above description is only an example of the present invention, and is not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention in the specification, or directly or indirectly applied to the related technical field, are included in the scope of the present invention.
Claims (5)
1. The preparation process of the flame-retardant bamboo board is characterized by comprising the following steps:
drying the bamboo chips for the first time;
carbonizing the bamboo chips dried for the first time in an environment of 220 ℃, and uniformly spraying water to the bamboo chips during carbonization so as to keep the surface temperature of the bamboo chips at 160 ℃;
cooling the carbonized bamboo chips, and performing first impregnation to enable glue to penetrate into the bamboo filaments;
drying the bamboo chips subjected to the first gum dipping for the second time;
performing secondary impregnation on the bamboo chips dried for the second time to enable the glue to wrap the surfaces of the bamboo chips;
drying the bamboo chips subjected to the second gum dipping for the third time;
pressing the dried bamboo chips for the third time at 20-28MPa to form bamboo boards;
the temperature of the first drying is 50-60 ℃, and the time is 5-7h;
the temperature of the second drying is 50-60 ℃ and the time is 1-1.5h, and the temperature of the third drying is 50-60 ℃ and the time is 1-1.5h;
the density of the bamboo board is 1.25g/cm 3 The above.
2. The preparation process of the flame retardant bamboo board as claimed in claim 1, wherein the first dipping time is 20-40min.
3. The preparation process of the flame retardant bamboo board as claimed in claim 1, wherein the time of the second dipping is 20-40min.
4. The process for preparing fire retardant bamboo board according to claim 1, wherein the first dipping time is 20min.
5. The process for preparing fire retardant bamboo board according to claim 1, wherein the time of the second dipping is 20min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111435172.8A CN114012861B (en) | 2021-11-29 | 2021-11-29 | Preparation process of flame-retardant bamboo board |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111435172.8A CN114012861B (en) | 2021-11-29 | 2021-11-29 | Preparation process of flame-retardant bamboo board |
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| CN114012861A CN114012861A (en) | 2022-02-08 |
| CN114012861B true CN114012861B (en) | 2023-04-14 |
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| CN100999094A (en) * | 2007-01-05 | 2007-07-18 | 钱琦 | Twig laminated board and its production method |
| CN101108496A (en) * | 2007-07-14 | 2008-01-23 | 唐海亮 | Technique for manufacturing ultrapas faced decorative board |
| CN102214507A (en) * | 2010-04-06 | 2011-10-12 | 南通市神马电力科技有限公司 | Composite hollow insulator |
| CN103643783B (en) * | 2013-12-02 | 2016-05-04 | 南京林业大学 | A kind of outdoor Recombined bamboo floor and manufacture method thereof |
| CN107116637B (en) * | 2017-05-16 | 2019-06-11 | 阜南县宏达工艺品厂 | A kind of processing method enhancing bamboo cane resistance to ag(e)ing |
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